Source code install broken

I’ve been trying to get the source code, or UnrealEditor.exe to work correctly. It has been quite frustrating. Here is what I did:

  1. Cloned the github repo, follow all the instructions, finish building the UnrealEditor.exe.
  2. Open UnrealEditor.exe and finds that it doesn’t work, receives the error “The core execution could not proceed because (UnrealEditor-Core.dll, UnrealEditor-CoreUObject.dll, UnrealEditor-InputCore.dll) was not found. Reinstalling might solve the problem.”
  3. Notice that my Storage only has 26 GB left… I thought that was the cause.
  4. Proceeds to delete the entire repo file… which is frustrating to say the least considering the sheer amount of download time required for those few hundred GB.
  5. Redownloaded the repo and go through the instructions again.
  6. Open UnrealEditor.exe… and it works! I was very relieved that all my effort meant something.
  7. I closed UnrealEditor.exe and noticed that it was gone from the Win64 file. I pinned it to the desktop so I tried to open it again.
  8. Received the very same error I got previously.

Note: There are 4 different erorr messages, each saying that a .dll file is missing.
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PC: Windows 11
CPU: 13th Gen Intel(R) Core™ i5-13600KF
RAM: 4 3600 MHZ 16 GB Corsair Dominators
GPU: NVIDIA GeForce RTX 3070

Are you building in the Development-Editor build configuration? This seemed to be the problem for another person here.

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Also, just a random guess but are you pinning the exe file or a shortcut to the desktop? Pinning the exe file and running it will not work.

I found the UnrealEditor.exe file under the Win64 directory so I pinned it to the desktop. Next time I closed unreal engine, the .exe file was gone while the pinned .exe was still there with the errors.

You are probably moving the exe from the folder to your desktop. Doing this will definitely not work as it needs to be in the Binaries folder. To be able to start unreal from your desktop, right click the UnrealEditor.exe, and click on “create shortcut”. Now you can move the shortcut anywhere you’d like. Move the shortcut just like you did for UnrealEditor.exe and try to run it. It should run fine. If you still have any problems let me know!

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That is plausible. After rebuilding and applying build at NMake from properties it seems to work now. I was already at development editor so that wasn’t the issue. Thanks for the advice as well as the link to the previous issue, I couldn’t find it before.

Glad to be able to help!

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